package edu.nps.moves.dis7;

import java.io.*;

/**
 * Specifies the character set used in the first byte, followed by up to 31
 * characters of text data. Section 6.2.4.
 *
 * Copyright (c) 2008-2016, MOVES Institute, Naval Postgraduate School. All
 * rights reserved. This work is licensed under the BSD open source license,
 * available at https://www.movesinstitute.org/licenses/bsd.html
 *
 * @author DMcG
 */
public class AggregateMarking extends Object implements Serializable {

    /**
     * The character set
     */
    protected short characterSet;

    /**
     * The characters
     */
    protected byte[] characters = new byte[31];

    ;

    /**
     * Constructor
     */
    public AggregateMarking() {
    }

    public int getMarshalledSize() {
        int marshalSize = 0;

        marshalSize = marshalSize + 1;  // characterSet
        marshalSize = marshalSize + characters.length;  // characters

        return marshalSize;
    }

    public void setCharacterSet(short pCharacterSet) {
        characterSet = pCharacterSet;
    }

    public short getCharacterSet() {
        return characterSet;
    }

    /**
     * Ensure what is set does not go over 31 characters, and anything under 31
     * characters zero-fills. post-processing patch
     *
     * @param pCharacters an array of characters to set
     */
    public void setCharacters(byte[] pCharacters) {
        if (pCharacters.length >= characters.length) {
            System.arraycopy(pCharacters, 0, characters, 0, characters.length);
        } else {
            int pCharactersLength = pCharacters.length;
            System.arraycopy(pCharacters, 0, characters, 0, pCharactersLength);
            for (int ix = pCharactersLength; ix < characters.length; ix++) {
                // Ensure all zeros in unfilled fields
                characters[ix] = 0;
            }
        }
    }

    public byte[] getCharacters() {
        return characters;
    }

    public void marshal(DataOutputStream dos) {
        try {
            dos.writeByte((byte) characterSet);
            for (int idx = 0; idx < characters.length; idx++) {
                dos.writeByte((byte) characters[idx]);
            } // end of array marshaling            
        } // end try 
        catch (Exception e) {
            System.out.println(e);
        }
    } // end of marshal method

    public void unmarshal(DataInputStream dis) {
        try {
            characterSet = (short) dis.readUnsignedByte();
            for (int idx = 0; idx < characters.length; idx++) {
                characters[idx] = (byte) dis.readUnsignedByte();
            }
        } // end try 
        catch (Exception e) {
            System.out.println(e);
        }
    } // end of unmarshal method 

    /**
     * Packs a Pdu into the ByteBuffer.
     *
     * @throws java.nio.BufferOverflowException if buff is too small
     * @throws java.nio.ReadOnlyBufferException if buff is read only
     * @see java.nio.ByteBuffer
     * @param buff The ByteBuffer at the position to begin writing
     * @since ??
     */
    public void marshal(java.nio.ByteBuffer buff) {
        buff.put((byte) characterSet);
        for (int idx = 0; idx < characters.length; idx++) {
            buff.put((byte) characters[idx]);
        } // end of array marshaling
    } // end of marshal method

    /**
     * Unpacks a Pdu from the underlying data.
     *
     * @throws java.nio.BufferUnderflowException if buff is too small
     * @see java.nio.ByteBuffer
     * @param buff The ByteBuffer at the position to begin reading
     * @since ??
     */
    public void unmarshal(java.nio.ByteBuffer buff) {
        characterSet = (short) (buff.get() & 0xFF);
        for (int idx = 0; idx < characters.length; idx++) {
            characters[idx] = buff.get();
        } // end of array unmarshaling
    } // end of unmarshal method 


    /*
  * The equals method doesn't always work--mostly it works only on classes that consist only of primitives. Be careful.
     */
    @Override
    public boolean equals(Object obj) {

        if (this == obj) {
            return true;
        }

        if (obj == null) {
            return false;
        }

        if (getClass() != obj.getClass()) {
            return false;
        }

        return equalsImpl(obj);
    }

    /**
     * Compare all fields that contribute to the state, ignoring transient and
     * static fields, for <code>this</code> and the supplied object
     *
     * @param obj the object to compare to
     * @return true if the objects are equal, false otherwise.
     */
    public boolean equalsImpl(Object obj) {
        boolean ivarsEqual = true;

        if (!(obj instanceof AggregateMarking)) {
            return false;
        }

        final AggregateMarking rhs = (AggregateMarking) obj;

        if (!(characterSet == rhs.characterSet)) {
            ivarsEqual = false;
        }
        for (int idx = 0; idx < 31; idx++) {
            if (!(characters[idx] == rhs.characters[idx])) {
                ivarsEqual = false;
            }
        }

        return ivarsEqual;
    }
} // end of class
